Tablet Requirements: AT&T Multi-band GSM, UMTS, or LTE Tablet or unlocked Multi-band GSM Tablet (850/1900 MHz), UMTS Tablet (850/1900 MHz), or LTE Tablet (Band 2 1900 MHz / Band 4 1700 MHz / Band 5 800 MHz / Band 17 700 MHz). If using a tablet from another carrier, you may need to contact the carrier to have it unlocked. Not all features work on all tablets.